• Title/Summary/Keyword: 인공 함양

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Hydrogeological Characteristics of the Wangjeon-ri PCWC area, Nonsan-city, with an Emphasis on Water Level Variations (논산시 왕전리 수막재배지역의 지하수위 변화)

  • Cho, Byong-Wook;Yun, Uk;Lee, Byeong-Dae;Ko, Kyung-Seok
    • The Journal of Engineering Geology
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    • v.22 no.2
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    • pp.195-205
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    • 2012
  • We evaluated the results of pumping tests, the amount of groundwater used by Protected Cultivation with Water Curtain (PCWC), and monthly depth to water table (DTW) at the Wangjeon-ri area, Nonsan City, to elucidate the cause of a decrease in pumping rate during the winter PCWC season. The transmissivity and storage coefficient at eight sites where the major aquifer is alluvium, vary from 119.9 to $388.1m^2/d$ and $1.5{\times}10^{-4}$ to $5.5{\times}10^{-4}$, respectively. The pumping rate for PCWC during three months (Dec. to Feb.) averaged about $8,100m^3/d$ and the maximum water level in the area varied by about 10 m. Groundwater levels had fully recovered by August-five months after pumping for PCWC had ceased. These observations indicate that the pumping rate during the winter PCWC season was excessive compared with groundwater productivity in the area. Groundwater level in the central PCWC area varied from -3.0 to 4.38 m, exceeding the water level of the Nosung Stream for only three months (Aug. to Oct.). This result indicates that Nosung Stream recharges the area during the period from November to July. To solve the problem of reduced pumping rate during the winter PCWC season, it would be necessary to reduce the amount of groundwater used for PCWC or to develop an artificial recharge system using recycled groundwater.

Analysis of Students' Socioscientific Decision-Making from the Nature of Technology Perspectives (과학·기술관련 사회쟁점(SSI)에 대한 학생들의 주요 의사결정 논점의 기술의 본성(NOT)적 해석)

  • Lee, Hyunok;Lee, Hyunju
    • Journal of The Korean Association For Science Education
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    • v.35 no.1
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    • pp.169-177
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    • 2015
  • Since socioscientific issues (SSI) reflect various characteristics of new technologies designed to meet the incessant human needs in the contemporary society, this study explores the feasibility of adapting nature of technology (NOT) to analyze students' socioscientific decision-making. To achieve the aim, forty-five college students enrolled in a liberal arts course on science and technology studies participated in the study and responded to a GMO (golden rice) scenario in a written form. Four major viewpoints were identified from their writing: 1) is the technological artifact able to solve a societal problem?, 2) are there some alternatives to solve the societal problem?, 3) what kinds of side effects or flaws could turn up during distribution and consumption of the technological artifact?, and 4) can we cope with the technological uncertainty? We revisited the viewpoints within the NOT framework (technology as a 'fix,' cultural context and role of values, technological trade-offs, technology as a system, and technological progression). As a result, unlike NOS, NOT were quite explicitly represented in their decision-making and students' level of understanding on NOT varied. It indicates that NOT can be a promising construct for cultivating informed SSI decision-making.

Analysis of Recognition and Needs for Parents in Elementary, Middle, and High Schools for Mathematics Education (초·중등 학부모 대상 수학교과 인식 및 요구 조사)

  • Lee, Hyeung Ju;Kim, Hyeongsik;Ko, Ho Kyoung
    • Communications of Mathematical Education
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    • v.35 no.3
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    • pp.213-231
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    • 2021
  • This study is intended to investigate contents related to parents' perception and satisfaction level of school mathematics curriculum. Based on the results, this study intended to deduce implications for mathematics education in schools, child education, and parent education. According to the result of the survey, the more positively the parents perceived the value of the mathematics learning, the more positively the child perceived, and the higher the parent's participation rate in mathematics-related education was. In terms of perception of teaching and learning activities, it showed that the willingness to participate in educational programs was lower for the parents of middle and high school students than the parents of elementary school students and the parents of elementary school students also showed higher satisfaction level of school mathematics curriculum. parents have perceived the necessity of teaching and mathematics education to develop artificial intelligence or data analysis skills. It was also found that the parents of middle and high school students' participation experience in education had an effect on the satisfaction level of their children's math teacher's class preparedness. Parents perceived positively to how pragmatic mathematics curriculum can be and provided answers to what they wish in specific mathematics classes in learning methods and future mathematics learning. As this is for educational experts to consider much in-depth in the future, this study suggested the need for diverse parents' education related to mathematics including the expansion of mathematics education with parents' participation, the creation of a mathematics learning environment for future mathematics learning.

The Case Study on the Characteristics of Classroom Community in a Christian Alternative School : in Aspects of Activity, Relationship and Value (기독교 대안초등학교 학급의 공동체 특성에 대한 사례연구: 활동, 관계, 가치를 중심으로)

  • Ji, Mikyoung;Kim, Junghyo
    • Journal of Christian Education in Korea
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    • v.64
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    • pp.445-477
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    • 2020
  • The topic of school community is considered very important in Christian education because the Christian religion is based on relationships. However, the studies on school community in Christian education are insufficient. Therefore, this study intends to explore the characteristics of school communities in Christian elementary school through descriptive approach. For this, data was collected through a ten-week participant observations and ten-time interview with the teachers, students, and parents, and artifacts collection. The result of the analysis, students were growing up with experiencing inner conflicts when they have a good relationship with their friends as a member of one community. This study gives suggestions to Christian school and public school communities as follows. First, studies on Christian schools' community have to be based on the Christian worldview. Second, The community of justice needs to be included in Christian school communities. Third, Christian school students experience continuous inner conflicts when practicing Christian values, thus the classroom community needs to be a place where students can talk about it openly. Fourth, public schools only consider the abilities to cultivate community competence, but it needs to apply the Christian school community where it is comfortable and acceptable to reveal weakness. In this way, the community will become a more humanistic environment.

Development of a Program for Calculating Typhoon Wind Speed and Data Visualization Based on Satellite RGB Images for Secondary-School Textbooks (인공위성 RGB 영상 기반 중등학교 교과서 태풍 풍속 산출 및 데이터 시각화 프로그램 개발)

  • Chae-Young Lim;Kyung-Ae Park
    • Journal of the Korean earth science society
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    • v.45 no.3
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    • pp.173-191
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    • 2024
  • Typhoons are significant meteorological phenomena that cause interactions among the ocean, atmosphere, and land within Earth's system. In particular, wind speed, a key characteristic of typhoons, is influenced by various factors such as central pressure, trajectory, and sea surface temperature. Therefore, a comprehensive understanding based on actual observational data is essential. In the 2015 revised secondary school textbooks, typhoon wind speed is presented through text and illustrations; hence, exploratory activities that promote a deeper understanding of wind speed are necessary. In this study, we developed a data visualization program with a graphical user interface (GUI) to facilitate the understanding of typhoon wind speeds with simple operations during the teaching-learning process. The program utilizes red-green-blue (RGB) image data of Typhoons Mawar, Guchol, and Bolaven -which occurred in 2023- from the Korean geostationary satellite GEO-KOMPSAT-2A (GK-2A) as the input data. The program is designed to calculate typhoon wind speeds by inputting cloud movement coordinates around the typhoon and visualizes the wind speed distribution by inputting parameters such as central pressure, storm radius, and maximum wind speed. The GUI-based program developed in this study can be applied to typhoons observed by GK-2A without errors and enables scientific exploration based on actual observations beyond the limitations of textbooks. This allows students and teachers to collect, process, analyze, and visualize real observational data without needing a paid program or professional coding knowledge. This approach is expected to foster digital literacy, an essential competency for the future.

A Study on Forestation for Landscaping around the Lakes in the Upper Watersheds of North Han River (북한강상류수계(北漢江上流水系)의 호수단지주변삼림(湖水団地周辺森林)의 풍경적시업(風景的施業)에 관(関)한 연구(硏究))

  • Ho, Ul Yeong
    • Journal of Korean Society of Forest Science
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    • v.54 no.1
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    • pp.1-24
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    • 1981
  • Kangweon-Do is rich in sightseeing resources. There are three sightseeing areas;first, mountain area including Seolak and Ohdae National Parks, and chiak Provincial Park; second eastern coastal area; third lake area including the watersheds of North Han River. In this paper, several methods of forestation were studied for landscaping the North Han River watersheds centering around Chounchon. In Chunchon lake complex, there are four lakes; Uiam, Chunchon, Soyang and Paro from down to upper stream. The total surface area of the above four lakes is $14.4km^2$ the total pondage of them 4,155 million $m^3$, the total generation of electric power of them 410 thousand Kw, and the total forest area bordering on them $1,208km^2$. The bordering forest consists of planned management forest ($745km^2$) and non-planned management forest ($463km^2$). The latter is divided into green belt zone, natural conservation area, and protection forest. The forest in green belt amounts to $177km^2$ and centers around the 10km radios from Chunchon. The forest in natural conservation area amounts to $165km^2$, which is established within 2km sight range from the Soyang-lake sides. Protection forest surrounding the lakes is $121km^2$ There are many scenic places, recreation gardens, cultural goods and ruins in this lake complex, which are the same good tourist resources as lakes and forest. The forest encirelng the lakes has the poor average growing stock of $15m^3/ha$, because 70% of the forest consists of the young plantation of 1 to 2 age class. The ration of the needle-leaved forest, the broad-leaved forest and the mixed forest in 35:37:28. From the standpoint of ownership, the forest consists of national forest (36%), provincial forest (14%), Gun forest (5%) and private forest(45%). The greater part of the forest soil, originated from granite and gneiss, is much liable to weathering. Because the surface soil is mostly sterile, the fertilization for improving the soil quality is strongly urged. Considering the above-mentioned, the forestation methods for improving landscape of the North Han River Watersheds are suggested as follows: 1) The mature-stage forest should be induced by means of fertilizing and tendering, as the forest in this area is the young plantation with poor soil. 2) The bare land should be afforested by planting the rapid growing species, such as rigida pine, alder, and etc. 3) The bare land in the canyon with moderate moist and comparatively rich soil should be planted with Korean-pine, larch, ro fir. 4) Japaness-pine stand should be changed into Korean-pine, fir, spruce or hemlock stand from ravine to top gradually, because the Japanese-pine has poor capacity of water conservation and great liability to pine gall midge. 5) Present hard-wood forest, consisting of miscellaneous trees comparatively less valuable from the point of wood quality and scenerity, should be change into oak, maple, fraxinus-rhynchophylla, birch or juglan stand which is comparatively more valuable. 6) In the mountain foot within the sight-range, stands should be established with such species as cherry, weeping willow, white poplar, machilus, maiden-hair tree, juniper, chestnut or apricot. 7) The regeneration of some broad-leaved forests should be induced to the middle forest type, leading to the harmonious arrangement of the two storied forest and the coppice. 8) For the preservation of scenery, the reproduction of the soft-wood forest should be done under the selection method or the shelter-wood system. 9) Mixed forest should be regenerated under the middle forest system with upper needle-leaved forest and lower broad-leaved forest. In brief, the nature's mysteriousness should be conserved by combining the womanly elegance of the lakes and the manly grandeur of the forest.

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